<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <title>Colors</title>
    <link rel="stylesheet" href="oban.css"/>
    <style>
      div {
        margin: 30px;
        width: 300px;
        text-align: center;
      }
    </style>
  </head>
  <body>
    <div class="success">This is a success message</div>
    <div class="warning">This is a warning message</div>
    <div class="error">This is an error message</div>
  </body>
</html>
